Olfactory receptors and their utilizations

ABSTRACT

The invention relates to the discovery of new odorant receptors in the marmot, by cloning and by coding gene sequences for these receptors as well as using them for ligand screening and the preparation of biosensors.

RELATED APPLICATION

[0001] This is a continuation of International Application No. PCT/FR99/01495, with an international filing date of Jun. 22, 1999, which is based on French Patent Application No. 98/08094, filed Jun. 25, 1998.

FIELD OF THE INVENTION

[0002] The invention relates to the discovery of new odorant receptors in the marmot, by cloning and by coding gene sequences for these receptors as well as using them for ligand screening and the preparation of biosensors.

BACKGROUND

[0003] The recent discovery of odorant receptors of vertebrae overturns the strategies initially envisaged for the design and production of an artificial nose with physico-chemical sensors. In fact, at the beginning of the 1990's, biologists managed, starting from the odorant epithelium of mammals, to isolate and sequence the first proteins constituting the odorant receptors 3 and, in 1993, the first odorant receptor was expressed 7. Nonetheless, it is admitted that man, who has a limited sense of smell on a relative basis, is capable of differentiating between more than 10,000 odorant molecules and that 1% of his genome is composed of encoding genes for the odorant receptors (1).

[0004] It can thus be seen that there is an enormous field of investigation open to researchers in the domain of potential biological sensors. Besides this, it already seems that these biological sensors have a sensitivity which is about 100,000 times higher than the best physico-chemical sensors existing (4, 6). More recent works have shown that these detectors are also sensitive to non-biological molecules (5).

[0005] All living organisms depend on sensorial information for their survival. Sensorial perceptions are transmitted by the sense organs which receive the physical stimuli (seeing, hearing, touching) and chemical stimuli (taste, smell). In most species, the perception of chemical stimuli is essential for accomplishing several vital tasks such as finding food, identifying partners, identifying offspring and detecting predators or other dangers. In certain species, the sense of smell also allows communication over distances that can reach several kilometers between individuals, thereby enabling reassembly of the group, attack and defense reactions, and reproduction and suckling activities. The odorant molecules can also induce physiological changes.

[0006] In most cases, the odors result from a complex combination of several molecules. This complexity raises interesting questions about the characteristics of the receptors making it possible for animals to recognize a myriad of odorant molecules (estimated at more than 10,000) at concentrations as low as 10⁻¹² M. It seems that recognition is based on a large multigene family of odor receptors comprising several hundreds or thousands of sub-types. These receptors are supposed to contain 7 transmembranous domains, starting from the hypothesis according to which the odorant signals are transducted by cascades of reactions coupled with G proteins in the sensitive olfactory neurones. The transduction results in an increase of second messengers such as cyclic nucleotides or triphosphate inositol and, in their turn, these messengers activate the ion-dependent canals and the phosphorylation of several proteins among which are the odor receptors themselves.

[0007] Buck and Axel (3) first of all characterised the odor receptors of rats with the help of amplification techniques (PCR) and degenerate primers corresponding to the most conserved domains of receptors coupled with G proteins. Since these first works, more than 339 receptors have been sequenced, usually partially, among a great variety of species including man, the dog, the mouse, the chicken, two species of fish, two amphibian species and a nematode. However, many species still remain to be studied and it is estimated that more than 1,000 genes (that is 1% of the genome) encode for the super-family of olfactory receptors. The mechanisms subjacent to the olfactory perception are singular and unique in comparison with other sensorial systems and a more extensive study in this domain, which has important implications for identifying these proteins, is necessary.

SUMMARY OF THE INVENTION

[0008] The invention relates to an olfactory receptor including an amino acid sequence selected from SEQ ID No:1 to SEQ ID No:23, or a derivative functionally equivalent thereto. The invention also relates to polyclonal or monoclonal antibodies, nucleic acids, vectors, hosts, membranes, compounds and processes associated therewith.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Other advantages and characteristics of the invention will become apparent by reading the following examples concerning the identification and cloning of the olfactory receptors of the marmot, and which refer to the attached drawings in which:

[0010]FIG. 1 represents the analysis of PCR products from two types of cDNA ® and T) and 3 primer sets (c-t, 4-1 and 3-2). The reaction products were analyzed by electrophoresis on a 2% agarose gel, as described below in Material and Method. The size of the fragments was estimated by comparison with a standard of known size (right side). The deposits in the tracks marked with an asterisk contain the fragments of the size expected.

[0011]FIG. 2 shows the alignment of 14 of the 23 sequences of putative olfactory receptors of the marmot. 14 different sequences (AMOR 1 to AMOR 14) were analyzed using the Clustalw software. The shaded regions indicate the consensus domains containing amino acids almost (.) or totally (*) conserved. The transmembranous domains (DII to DVII), the extracellular loops (E1 to E3) and the intracellular loops (i2 to i3) were defined after determining the hydrophobic domains.

[0012]FIG. 3 represents the hydropathy plots of long sequences obtained with the set of c-t primers (AMOR 1 to AMOR 7) and the short sequences obtained with the set of 3-2 primers (AMOR 8 to AMOR 14) were obtained as described in Material and Methods. The long sequences contain 6 regions of high hydrophobicity (peaks) separated by 5 more hydrophilic depressions. The short sequences show only 4 regions of high hydrophobicity and 3 hydrophilic regions. These graphs are compatible with the presence of 6 or 4 transmembranous domains, for the long and short sequences respectively. This architecture is confirmed by the predictions of transmembranous helices by the PHD program.

[0013]FIG. 4 represents the analysis of the variability of 14 new non-interrupted sequences of the olfactory receptor of the marmot. The upper graph: variability in the residues calculated for the alignment of FIG. 2. The location of the peaks (the most variable positions) and the overall shape of the curve are independent of the formula used (Wu & Kabat, complexity or number of residues taken into account). The lower graph: average hydropathy index of the aligned sequences. The peaks correspond to the hydrophilic regions (loops) and the depressions to the hydrophobic regions (transmembranous domains). The graph minimizes the hydrophobicity of the fragment 1 to 59 since half the sequences are absent in these positions. While position 210 illustrates the usual variability of the hydrophilic loops shown, position 148 shows the most surprising high variability in a highly hydrophobic region (helicoidal) of the molecule.

[0014]FIG. 5 is a dendrogram showing similarities between the olfactory receptors of different species. The sequences of olfactory receptors of other species come from the NCBI data bank. There are five families (noted on the left). The asterisks indicate the sequences for which the percentage of similarity between species exceeds 70%. Abbreviations: H: man; F: fish, C: chicken; N: nematode; B: bee, A: amphibians; D: dog; M: mouse and MM: marmot.

DETAILED DESCRIPTION

[0015] Several works have emphasized the importance of olfaction for the marmot of the Alps (2). Ethological and analytic studies have shown that a group of 40 compounds, produced by the jugal glands, are used to mark territory and identify social groups. Work carried out within the framework of the invention on the olfactory epithelium of the marmot of the Alps was aimed mainly at obtaining a sufficient number of sequences of olfactory receptors to be able to make a significant comparison with the sequences of vertebrae already determined.

[0016] A strategy based on the RT-PCR was used for identifying the putative sequences of olfactory receptors of the marmot. Degenerate oligonucleotides corresponding to the sequence of conserved domains in the second transmembranous domain, the second intracellular loop and the 7th transmembranous domain of olfactory receptors were used in pairs as primers for the PCRs starting from the complementary DNA obtained by using the messenger RNA of the nasal epithelium of the marmot.

[0017] The research work carried out within the framework of the invention thus made it possible for the first time to identify, clone and sequence new olfactory receptors of the marmot. These receptors are useful for the design and development of biosensors or for the preparation of transfected cells. Thus, these receptors can be associated with artificial membranes which will be used in different biosensors arranged in parallel, each possessing a particular type of receptor, the ensemble being managed by a network software of formal neurones to constitute a detection system of the electronic nose type whose sensors are bio-electronic sensors.

[0018] The invention thus concerns a marmot purified olfactory receptor.

[0019] The distinction between the tens of thousands of odours depends on a myriad of receptors situated at the surface of the neurone dendrites of the nasal epithelium. By using the nasal epithelium of the marmot of the Alps and different sets of degenerate primers corresponding to consensus sequences of odour receptors, the inventors succeeded in amplifying by reverse-PCR (RT-PCR), cloning and obtaining the partial sequence of 23 new products of encoding genes for odour receptors. After consultation by the Blast software of the NCBI data bank, their translation into sequences of amino acids shows a strong similarity with protein sequences of odour receptors previously reported, and classes them without ambiguity in the same super-family of receptors with 7 transmembranous domains. The transmembranous helicoidal regions III, IV and V, as well as the intra- and extracellular loops have been defined by establishing a hydropathy plot and computer prediction of the secondary structure.

[0020] In a first mapping attempt of odour fixation sites, the inventors carried out a variability analysis of the type described by Wu and Kanat (8) on the regions determining the complementarity (CDR) of immunoglobulins. Four principal peaks of variability were located inside the predicted 1st and 3rd extracellular loops, and inside the predicted 4th and 5th transmembranous domains. These positions should thus be part of the specific liaison site for odorant molecules. Comparisons with the sequence of olfactory receptors of other species suggest that the marmot sequences determined in this study belong to three different families.

[0021] The invention thus concerns more particularly a purified olfactory receptor constituted by or comprising the sequence of amino acids chosen among those represented in the list of sequences in the appendix under the numbers SEQ ID No:1 to SEQ ID No:23, or a functional derivative equivalent to these. By equivalent derivative of these sequences, we mean the sequences comprising a modification and/or a suppression and/or an addition of one or several amino acid residues, but conserving about 75% and preferably at least about 95% of homology with the sequence from which it is derived. The receptors of the invention present some very conserved regions and some very heterogeneous regions. It is considered that the very conserved regions are those conferring the protein with its receptor property, while the very heterogeneous regions are those conferring each receptor with its specificity. Thus, according to the application envisaged, it is possible to prepare derivatives of the receptors of the invention whose specificity is modified but which remain within the framework of the invention.

[0022] Another aim of the invention is polyclonal or monoclonal antibodies directed against at least one receptor of the invention, a derivative or a fragment of these. These antibodies can be prepared by the methods described in the known literature. According to prior art techniques, polyclonal antibodies are formed by the injection of proteins, extracted from the epithelium or produced by genetic transformation of a host, into animals, and then recuperation of antiserums and antibodies from the antiserums for example by affinity chromatography. The monoclonal antibodies can be produced by fusing myeloma cells with spleen cells from animals previously immunized using the receptors of the invention. These antibodies are useful in the search for new olfactory receptors or the homologues of these receptors in other mammals or again for studying the relationship between the receptors of different individuals or species.

[0023] The invention also relates to a molecule of nucleic acid comprising or constituted of an encoding nucleic sequence for a receptor such as defined above. In particular, the invention relates to a molecule of nucleic acid comprising or constituted of a sequence chosen among those represented in the list of sequences under the numbers SEQ ID No:24 to SEQ ID No:46, which encode respectively for the receptors whose amino acid sequences are represented in the list of sequences under the numbers SEQ ID No:1 to SEQ ID No:23.

[0024] The invention also concerns the nucleotide sequences derived from the above sequences, for example, from the degeneracy of the genetic code, and which encodes for the proteins presenting characteristics and properties of olfactory receptors.

[0025] The invention also concerns a vector comprising at least one molecule of nucleic acid above, advantageously associated with adapted control sequences, together with a production or expression process in a cellular host of a receptor of the invention or a fragment thereof. The preparation of these vectors as well as the production or expression in a protein host of the invention can be carried out by molecular biology and genetic engineering techniques well known to the professional.

[0026] As an example, a production process of a receptor according to the invention consists of:

[0027] transfer of a molecule of nucleic acid of the invention or a vector containing said molecule to a cellular host,

[0028] cultivation of said cellular host in conditions allowing production of the protein constituting the receptor,

[0029] isolation of said proteins by appropriate means.

[0030] As example, a process for expressing a receptor according to the invention consists of:

[0031] transfer of a molecule of nucleic acid of the invention or a vector containing said molecule to a cellular host,

[0032] cultivation of said cellular host in conditions allowing expressivity of said receptors at the surface of the host.

[0033] The cellular host used in the above processes can be chosen among prokaryotes and eukaryotes and particularly among bacteria, yeasts, cells of mammals, plants or insects. Expressivity in eukaryote cells is preferable so that the receptors can undergo the post-translation modifications necessary for their functioning.

[0034] A molecule of encoding nucleic acid for an olfactory receptor or a vector according to the invention can also be used to transform animals and establish a line of transgenic animals.

[0035] The vector used is chosen as a function of the host into which it is to be transferred. It can be any vector such as a plasmid. Thus, the invention also relates to cellular hosts expressing olfactory receptors obtained in conformity with the preceding processes.

[0036] The invention also relates to nucleic and oligonucleotide probes prepared from the molecules of nucleic acid according to the invention. These probes, marked advantageously, are useful for hybridisation detection of similar receptor sequences in other individuals or species. According to prior art techniques, these probes are put into contact with a biological sample. Different hybridisation techniques can be used, such as Dot-blot hybridisation or replica hybridisation (Southern technique) or other techniques (DNA chips). Such probes constitute the tools making it possible to detect similar sequences quickly in the encoding genes for olfactory receptors which allow study of the presence, origin and preservation of these proteins.

[0037] The oligonucleotides are useful for PCR experiments, for example, to search for genes in other species or with a diagnostic aim.

[0038] As indicated above, the olfactory receptors are proteins with 7 transmembranous domains coupled with G proteins. Attachment of a ligand to a receptor brings about a change in the conformation of the receptor and inside the cell. This signal is transducted through the intermediary of second messengers. Consequently, an aim of the invention is a screening process for compounds capable of constituting ligands of the receptors described above consisting of putting in contact one compound and one or several of said receptors and of measuring by any appropriate means the affinity between said compound and said receptor.

[0039] The contact between the compound to be tested and the olfactory receptor or receptors of the invention can be carried out by using the hosts described above and expressing said receptors at least at their surface. It can consist of a line of immortalized cells, olfactory or not, transfected by a vector carrying cDNA making it possible to express at its surface and at a high level a functional recombinant olfactory receptor. If the compound tested constitutes a ligand, its contact with the transformed cells, induces intracellular signals which result from the fixation of said compound on the receptor.

[0040] The contact of the compounds to be tested with the receptors of the invention can also be carried out by fixing one or several receptors on one or several membranes. The olfactory receptors of the invention can thus also be integrated with a biosensor. In such a system, it is possible to visualize in real time the interactions between the compound being tested and the receptor. One of the partners of the couple receptor/ligand is fixed on an interface which can contain a matrix covered with aliphatic chains. This hydrophobic matrix can easily be covered with a lipidic layer by spontaneous fusion of liposomes injected into contact with it. Olfactory receptors inserted in the liposornes or vesicles can thus be integrated into the bio-sensors. The ligands are thus analyzed with regard to one or several different olfactory receptors.

[0041] The above methods make it possible to determine whether a compound activates or inhibits the receptors. In this embodiment, it is advantageous to use a known ligand which allows measurement by competition.

[0042] The invention also relates to a compound constituting a ligand of an olfactory receptor, identified and selected by the above process.

[0043] The receptors of the invention find applications in very varied domains such as:

[0044] the food processing industry, for detection of aromas, quality control, analysis of samples,

[0045] perfumery, for the analysis or comparison of perfumes,

[0046] the environment, for detecting toxic substances, such as gases or for trapping odors.

[0047] I—Material and Methods

[0048] 1. Preparation of the tissues.

[0049] The olfactory epithelium was removed from a dead wild marmot. During dissection, the head was kept frozen in dry ice. The tissues were kept at −80° C. until used.

[0050] 2. Isolation of the Messenger RNA.

[0051] The frozen tissues were reduced to dust by crushing them with a pestle and mortar. The pestle and mortar were cooled in the dry ice and all the equipment was sterile. The mRNA poly(A)+ was isolated using the Micro-Fast Track Kit (Invitrogen), then tested with the DNA DipStick Kit (Invitrogen).

[0052] 3. Transcription of the Complementary DNA.

[0053] The mRNA poly(A)+ was transcribed in cDNA with the aid of reverse transcriptase then amplified by PCR. In order to increase the production of the first complete strand of cDNA, the cDNA Cycle Kit was used. The reverse transcription was made from 150 ngm of mRNA poly(A)+ using oligo dT primers or random primers. After extraction with phenol/H₂O/EDTA (v/v/v: 1/20/80), the cDNA of the aqueous phase was precipitated in the presence of ammonium acetate and glycogen carrier in iced ethanol at −80° C.

[0054] 4. PCR.

[0055] Three sets of specific degenerate oligonucleotides for olfactory receptors were synthesized to amplify these marmot receptors.

[0056] From previous results obtained with the rat (3), two sets of primers were synthesized against the preserved regions of the second and seventh transmembranous domains of the olfactory receptors. Primer 4: 5′-CC(CT) ATG TA(TC) TTI TT(TC) CT(CT) I(GC)(CT) AA(TC) (TC) TI IC. Primer C: 5′-CC(CT) ATG TA(TC) TTG TT(TC) CT(CT) G(GC)(CT) AA(TC) (TC)TG TC-. Primer 1: 5′-(AG)TT (TC)C(TG) IA(AG) (AG)(CG)(AT) (AG)TA TAT (GA)A(AT) IGG (AG)TT. Primer T: 5′-GCA CTG CAG AT(AG) AAI GG(AG) TTI A(AG) ATI GG.

[0057] These combinations of primers were designed to make it possible to amplify products by the order of 720 pb.

[0058] From previous results obtained with the rat (3) and the catfish, the 3rd set of degenerate oligonucleotides was synthesized from the conserved regions of the 2nd intracellular loop and the 7th transmembranous domain. Primer 3: 5′-CAC AAG CTT TIG CIT A(TC)G A(CT)A G(AG)T (TA)(TC)(TCG) TIG C. Primer 2: 5′-GCA CTG CAG AT(AG) AAI GG(AG) TTI A(AG)C ATI GG.

[0059] These primer combinations were designed to make it possible to amplify products by the order of 520 pb.

[0060] Amplification was carried out in 50 micro liters of a solution containing 5 microliters of cDNA, 2 mM dNTP, 100 pmol of each degenerate primer, 1.5 U of Taq polyinerase (Boehringer Mannheim, Germany), 50 mM KC1, 2.5 mM MgCl₂, 10 mM Tris/HCl pH 8.3 and 0.01 of gelatine. In order to avoid evaporation, the surface of the mixture was covered by 35 microliters of mineral oil (Sigma, France). The PCR was carried out with the aid of a thermocycler (Hybaid, Ornnigene, USA) according to the following protocol: one cycle at 94° C. during 90 sec, 40 cycles at 94° C. during 20 sec, 50° C. during 25 sec and 72° C. during 90 sec, and one cycle at 72° C. during 120 sec.

[0061] After the PCR, 5 microliters of the reaction product were analyzed on Seaplaque 2% agarose gel, to verify the presence of the fragment (Tebu). If it was present, the 45 microliters remaining were submitted to electrophoresis and the cDNA was extracted from the agarose gel using the QIARX II kit (Qiagen). The cDNA extract was inserted in the pMOSBlue vector which had been used to infect the competent MOSBlue E. coli cells using the T-vector pMOSBlue kit according to the protocol of the supplier (Amersham). The infected bacteria were then cultivated on a selective medium (Xgal/IPTG).

[0062] The recombinant clones were tested by direct on colony PCR. Briefly, each white colony was re-suspended in 10 microliters of TE buffer. The PCR was carried out in 10 microliters of a solution containing 1 microliter of colony suspension, 3 pmoles of each universal primer U19 and T7, 10 mM dNTP, 50 mM KCl and 2.5 mM MgCl₂ in a Tris HCl buffer pH 8.3 with 0.25 U of Taq polymerase. The protocol for the PCR was the following: one cycle at 94° C. during 270 sec, 30 cycles at 94° C. during 30 sec, 48° C. during 30 sec and 72° C. during 50 sec, and one cycle at 72° C. during 120 sec. After the PCR, 10 microliters of the reaction product were analyzed on a 2% agarose gel. The positive clones were cultivated in a liquid LB medium containing 0.1 mg/ml ampicillin.

[0063] 5. Extraction and Purification of cDNA Fragments.

[0064] The plasmidic cDNA was extracted and purified using the Wizard miniprep kit (Promega). The samples were sequenced by Genorne Express (Grenoble, France).

[0065] 6. Analysis of Sequences.

[0066] The comparison of olfactory receptor sequences of the marmot of the invention with sequences available in GenBank/GenPept was carried out using the Blast software on the NCBI server. ClustalW was used to build the multiple alignments and to carry out the phylogenetic analysis. The hydrophobic domains were defined by using a simple hydropathy plot, and the prediction of α-helicoidal transmembranous domains by using the PHD server. Finally, the variability of the 14 marmot sequences aligned, together with their average hydropathy, were determined and transformed into graph form using the Rav3 software. The transmembranous domains were predicted with the Top Pred II software.

[0067] II—RESULTS

[0068] 1. Isolation of the Messenger RNA.

[0069] A sample of approximately 2 gm, containing essentially olfactory epithelium and the supporting cartilage was taken from the frozen head of a marmot. This sample was used for purification and the mRNA tests according to the description in the section Material and Methods. In total, 1.95 micrograms of mRNA were obtained. In order to increase the possibilities of cloning the olfactory receptors, half the mRNA obtained was transcribed in presence of the d(T) oligo primer and the other half in presence of the random primer (R).

[0070] 2. Amplification of Olfactory Receptor Sequences.

[0071] Amplification by PCR was carried out with 150 ngm of mRNA using the three sets of degenerate specific primers (c-t, 4-1, 3-2) described above in Material and Methods. Analysis of the electrophoresis carried out with aliquots of 5 microliters of products from the PCRrevealed single bands of the size expected (FIG. 1). With “T” cDNA, a 520 pb band was obtained with the 3-2 primers and a 720 pb band with the c-t primers. With “R” cDNA, a 720 pb band was obtained using the c-t primers. No band was observed in the three other tracks. In the control PCRs, in which a single primer was used, no band of the length expected was observed. The electrophoresis was repeated using the 45 remaining microliters of the sample, and the fragments of 550 and 720 pb were extracted. Given the diversity of the olfactory receptors, it was considered that the cDNA population in a band was heterogeneous and thus there was no attempt to sequence directly the cDNA fragments amplified by PCR. These fragments were cloned in E. coli as described above.

[0072] 3. Cloning.

[0073] After insertion in the p-Mosblue vector and the infection of competent MOSBlue E. coli, 139 bacterial clones were obtained in total, including 58 from the PCR obtained from the “R” cDNA and the c-t primers (clones R c-t), 31 from the PCR obtained from the “T” cDNA and the c-t primers (clones T c-t) and 50 from the PCR obtained from the “T” cDNA and the 3-2 primers (clones T 3-2). In order to confirm the presence of the expected fragment, we carried out another PCR on each of the 139 clones using the primers corresponding to the vector zones situated on each side of the fragment. Electrophoresis on agarose gel of the PCR products showed that 5 R c-t clones, 10 T c-t clones and 22 T 3-2 clones possessed fragments of the size expected. These 37 positive clones were cultivated again for mass production.

[0074] 4. Sequencing.

[0075] The plasmidic DNA was extracted, purified and sequenced, as described above. The nucleotide sequences were compared with those found in the data banks. Out of the 28 sequences with high scores of similarity with olfactory receptors, 14 were different and uninterrupted (AMOR 1 to 14) and could encode for olfactory receptors. The other 14 sequences were identical (n=8), unusable (n=3) or incomplete for our experimental conditions (116, 153, 159 amino acids). The 14 usable sequences had a single frame open for reading allowing their translation as amino acids. Attribution of the correct reading sequence was confirmed by the similarity of these putative translations with the amino acid sequences of other olfactory receptors available in the Gen Bank/Gen Pept.

[0076] The percentage of identical residues in the best alignments spread between 84% (between AMOR4 and a partial sequence of Xenopus laevis access No. #:1617233) and 46% (between AMOR5 and the Rattus norvegicus sequence access No. #:1016362). 7 of the 14 marmot sequences showed the best alignment with different rat receptors, 3 with the same human receptor (access #:AC002988), 3 with the same dog sequence (access #:x89660) and one with the Xenope sequence mentioned above. The average percentage of identical residues was 64%. Seven (AMOR 1-7) of the new marmot sequences were amplified from a couple of primers conceived from the transmembranous domains II and VII and have a length of 234 to 237 residues. Seven other sequences (AMOR 8-14) were obtained with primers conceived from the intracellular loop 2 (i2) and the transmembranous domain VII and contain 176 residues. The percentage of identical residues between these 14 new sequences is comprised between 33% (AMOR 4/AMOR 8) and 79% (AMOR 8/AMOR 11).

[0077] 5. Structure of the Domain of the Putative Olfactory Receptor of the Marmot.

[0078] The global homology between the 14 new marmot sequences and the sequences of receptors identified previously leaves little doubt about their belonging to the same super-family of receptors with 7 transmembranous domains. According to the location of the primers used to amplify them, the partial sequences AMOR 1-7 and AMOR 8-14 should present 6 or 4 transmembranous domains respectively. FIG. 3 shows that the hydrophobicity profile of these sequences is compatible with such an organization. In order to define more precisely the a-helicoidal transmembranous regions, the alignment of FIG. 2 was also submitted to the PHD server. 5 transmembranous regions were assigned without ambiguity in the respective regions (38-62), (86-103), (140-164), (186-203) and (216-232), which correspond to the domains DIII, DIV, DV, DVI and DVII in FIG. 2.

[0079] The inventors also tried to situate the positions involved in the specific fixation site for odor by applying an analysis introduced previously for molecules which link antigens. Here, the reasoning is that if these olfactory receptors are supposed to link odorant molecules specifically, the residues which constitute the specific linkage site could show more variability than those which are involved in the core structure and in the signaling function.

[0080]FIG. 4 shows the variability profiles obtained with the alignment of FIG. 2. Four variability peaks are clearly visible. The average hydropathy plot shown in parallel (FIGS. 2 and 4) indicates that they are not only situated inside hydrophilic loops as expected (position 210), but also in hydrophobic regions (e.g. position 148). The center of the most variable segments is situated in positions 30, 100, 148 and 210, the mapping respectively inside the 1st extracytoplasmic loop E1, the 4th and 5th transmembranous regions DIV and DV and the middle of the 3rd extracytoplasmic loop E3. We suggest that the residues in these positions could be implicated in the linking site of unknown odorant molecules corresponding to these receptors. These positions are compatible with the hypothesis according to which the transmembranous regions could assemble in a calyx open to the exterior and able to receive an odorant molecule. Such a model also accords with the fact that many odorant molecules show a hydrophobic character.

[0081] 6. Structural Classification of Olfactory Receptors.

[0082] We have tried to classify the cloned receptors of the marmot relative to the sequences described above for other species. FIG. 5 shows a structural classification of 122 olfactory receptors from the EMBLdata bank found in different species as well as the 14 complete sequences and the 3 incomplete sequences identified in the marmot within the framework of the present invention. With the exception of fish receptors, the receptors are not grouped together by species. There are 5 families containing a varied number of receptors. The marmot olfactory receptors were classified in sub-families 1, 2 and 5.12 sequences were classified in the sub-family 2.

[0083] The highest percentage of interspecies homologues (over 70% of identical residues) between olfactory receptors was observed in 9 cases indicated by an asterisk: between the rat and the mouse (up to 95%) in 5 cases, between the rat and man (80%) in one case, between the dog and man (up to 85%) in two cases, between the marmot receptor and that of the rat in one case (73%). The homology between human and marmot receptors never exceeded 75% of identical residues.

[0084] III—DISCUSSION

[0085] The olfactory receptors comprise a large multigene family. Their study requires a combination of approaches. A strategy of reverse PCR with several different primers was used within the framework of the present invention. This approach was crowned with success since 28 putative sequences of olfactory receptors, of which 14 could allow comparative analysis, were obtained. It is possible to obtain more sequences by simply changing the PCR conditions. The family of genes cloned within the framework of the present invention encode olfactory receptors for two reasons. On the one hand, the hydropathy plots of sequences are in agreement with the receptors of the super-family of receptors with seven transmembranous domains. On the other hand, comparison with the sequences in data banks shows a strong degree of similarity with the olfactory receptors previously identified.

[0086] The potential sites for ligand recognition on the putative olfactory receptors of the marmot have been identified. Since olfaction requires the specific recognition of a great variety of odorant molecules, it was postulated that the liaison site of the olfactory receptor with its ligand would present a greater variability between residues than the other parts of the sequence responsible for the core structure and the function of transduction. The greatest variability was observed within two transmembranous domains (DIV and DV) and within two extracellular loops (E1 and E3). It was therefore concluded that these regions could be involved in the recognition of the ligand.

[0087] The presence of a deep liaison site in the transmembranous calyx is not a property specific to receiving olfactory receptors but is common among receptors with 7 transmembranous domains of biogenic arnines.

[0088] The principal interaction site between the receptors with 7 transmembranous domains and the related G protein is the third intracellular loop. For the sequences presented here, the most conserved segment is located between positions 180 and 193, that is to say the end of this loop and the beginning of the 6th transmembranous domain.

[0089] The results obtained indicate a remarkable analogy between the olfactory receptor of the marmot and the olfactory receptor of the rat. The length (18 residues) of the 3rd intracellular loop (B) was short. The IVSSI consensus sequence (or a close sequence) was at the N-terminal end of the 3rd intracellular loop in 75% of clones of the invention. The third intracellular loop is rich in Serine residues and can thus constitute phosphorylation sites for GRK. The receptors with 7 transmembranous domains are classified into several groups. The olfactory receptors are supposed to belong to the group 1, which is characterised by the presence of a strictly conserved DRY sequence of the N-terminal side of i2. The DRY sequence is present in 4 of the clones of the invention but is replaced by a DRF sequence in the remaining 10.

[0090] The recognition of the same odors by different species brings up an interesting question. It can be expected that these species have autologous receptors. Using the clustalW software (FIG. 5), the inventors tried to determine whether certain olfactory receptors of the marmot were bona fide autologues of olfactory receptors of other species, in particular other rodents. For the receptors coupled with G proteins, the identity percentages between the autologous receptors of different species ranged from 68% (for the CSN receptor, between the dog and man) to 98% (for the cannabinoid receptor of the rat and man). Olfactory receptors with percentages of similitude of this order were observed between the rat and the mouse, the rat and man, and the dog and man. A single marmot olfactory receptor showed a similitude percentage of this order with a rat receptor (AMOR14 73%). In general, we found few close homologues. This discovery could indicate that either the number of olfactory receptors was too small to allow identification of real autologous receptors, or the percentage of similarity between autologous olfactory receptors can become lower than 68%.

[0091] Another alternative could be that wild animals express receptors for a greater number of odors than laboratory animals. The marmot of the Alps (Marmota marmota) was chosen as a model in this study based on the hypothesis that, given the importance of olfaction in its survival in the wild, its olfaction must be highly developed. The marmot of the Alps marks out its territory with secretions produced by its jugal glands. In addition, for this animal, the sense of smell is of greatest importance because this species possesses a very high sociability level: it lives in family groups formed by a pair of resident reproductive adults and their offspring of several successive litters which stay in their natal group until the age of 2 years or more. Each marmot has a combination of different odorant molecules which members of the same group or of a different group can sense.

[0092] Contrary to other sensor systems, the olfactory system requires a myriad of different receptors. Since mammals are supposed generally to have about a thousand genes, the clones identified in this study probably represent only a part of the family of olfactory receptors of the marmot. In addition to the contribution to the number of receptors identified, our results also support the existence of autologous receptors between species and the notion that the local variability observed in certain transmembranous domains could be capital for the specificity of a receptor. How even a thousand receptors could be able to distinguish among the tens of thousands of odors found in nature is not yet clarified. The final confirmation of the nature and olfactory specificity of these receptors will not be possible until the entire sequence has been obtained and the specific liaison with one or several odorant molecules demonstrated.

BIBLIOGRAPHIC REFERENCES

[0093] (1) Axel R. (1995). The molecular logic of smell. Scientific American October 154-159.

[0094] (2) Bel M-C., Porteret C. and Coulon J. (1995). Scent deposition by cheek rubbing in the Alpine marmot (Marmota marmota) in the French Alps. Can. J Zool., 73. 2065-2071.

[0095] (3) Buck L. and Axel R. (1991). A novel multigene family may encode odorant receptors: a molecular basis for odor recognition. Cell. 65, 175-187.

[0096] (4) Cornell B. A., Braach-Maksvytis, V. L. B., King L. G., Osman P. D. J., Raguse B., Wieczorek L. and Pace R. J. (1997). A biosensor that uses ion-channel switches. Nature 387, 580-583.

[0097] (5) Kinoshita. T. (1995) Biomembrane mimetic systems. Prog. Polym. Sci., 20, 527-583.

[0098] (6) Mielle P. (1998). Une technique de pointe au service du contrôle de la qualité aromatique. Biofuture, 174, cahier n° 99.

[0099] (7) Raming K., Krieger J., Strotmann J., Boekhoff I., Kubick S., Baurnstark C., and Breer H. (1993). Cloning and expression of odorant receptors. Nature, 361, 353-356.

[0100] (8) Wu T. T., and Kabat E. A. (1970). An analysis of the sequences of the variable regions of Bence Jones proteins and myeloma light chains and their implications for antibody complementarity. J. Exp. Med., 132, 211-250.

1 52 1 237 PRT Mus montanus 1 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Leu Asp Leu Ser Phe 1 5 10 15 Thr Thr Ser Ser Ile Pro Gln Leu Leu His Asn Leu Ser Gly Arg Asp 20 25 30 Lys Thr Ile Ser Tyr Val Gly Cys Val Val Gln Leu Phe Leu Phe Leu 35 40 45 Gly Leu Gly Gly Val Glu Cys Leu Leu Leu Ala Val Met Ala Tyr Asp 50 55 60 Arg Phe Val Ala Val Cys Lys Pro Leu His Tyr Thr Val Ile Met Ser 65 70 75 80 Ser Arg Leu Cys Leu Gly Leu Val Ser Val Ala Trp Gly Cys Gly Met 85 90 95 Ala Asn Ser Leu Val Met Ser Pro Val Thr Leu Gln Leu Pro Arg Cys 100 105 110 Gly His Asn Lys Val Asp His Phe Leu Cys Glu Met Pro Ala Leu Ile 115 120 125 Arg Met Ala Cys Val Asn Thr Val Ala Ile Glu Gly Thr Val Phe Val 130 135 140 Leu Ala Val Gly Ile Val Leu Ser Pro Leu Val Phe Ile Leu Val Ser 145 150 155 160 Tyr Gly His Ile Val Arg Ala Val Phe Arg Ile Gln Ser Ser Ser Gly 165 170 175 Arg His Arg Ile Phe Asn Thr Cys Gly Ser His Leu Thr Val Val Ser 180 185 190 Leu Phe Tyr Gly Asn Ile Ile Tyr Met Tyr Met Gln Pro Gly Ser Arg 195 200 205 Ser Ser Gln Asp Gln Gly Lys Phe Leu Thr Leu Phe Tyr Asn Ile Val 210 215 220 Thr Pro Leu Leu Asn Pro Phe Ile Tyr Ser Leu Arg Asn 225 230 235 2 237 PRT Mus montanus 2 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Val Glu Val Cys Leu 1 5 10 15 Thr Ser Thr Thr Val Pro Lys Ile Leu Val Asn Thr Gln Thr Leu Ser 20 25 30 Lys Asp Ile Ser Tyr Arg Gly Cys Leu Thr Gln Val Tyr Phe Leu Met 35 40 45 Val Phe Ala Gly Met Asp Asn Phe Leu Leu Thr Val Met Ala Phe Asp 50 55 60 Arg Phe Val Ala Ile Cys Tyr Pro Leu Asn Tyr Thr Val Ile Met Asn 65 70 75 80 Pro Arg Leu Cys Val Leu Leu Val Leu Leu Ser Trp Leu Ile Met Phe 85 90 95 Trp Val Ser Leu Leu His Ile Leu Leu Leu Lys Arg Leu Thr Phe Ser 100 105 110 Ser Gly Thr Ala Val Pro His Phe Phe Cys Glu Leu Ser Gln Leu Leu 115 120 125 Lys Ala Thr Ser Ser Asp Thr Leu Val Asn Ile Ile Leu Leu Tyr Val 130 135 140 Val Thr Ala Leu Leu Gly Ile Phe Pro Ala Thr Gly Ile Leu Tyr Ser 145 150 155 160 Tyr Ser Gln Ile Val Ser Ser Leu Leu Arg Met Ser Ser Ser Val Gly 165 170 175 Lys Ser Lys Ala Phe Ser Thr Cys Gly Ser His Leu Cys Val Val Ser 180 185 190 Leu Phe Tyr Gly Thr Gly Leu Gly Val His Leu Ser Ser Ala Met Asn 195 200 205 His Pro Ser Gln Gly Asn Met Ile Ala Ser Val Met Leu His Cys Gly 210 215 220 His Pro Met Leu Asn Pro Ile Ile Tyr Thr Leu Arg Asn 225 230 235 3 237 PRT Mus montanus 3 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Leu Glu Val Trp Tyr 1 5 10 15 Thr Thr Ala Ala Val Pro Lys Ala Leu Ala Ile Leu Leu Gly Arg Ser 20 25 30 Gln Ser Ile Ser Phe Ile Ser Cys Leu Leu Gln Met Tyr Leu Val Phe 35 40 45 Ser Leu Gly Cys Thr Glu Tyr Phe Leu Leu Val Ala Met Ala Tyr Asp 50 55 60 Arg Tyr Val Ala Ile Cys Phe Pro Leu His Tyr Thr Thr Ile Met Ser 65 70 75 80 Leu Lys Leu Cys Leu Ser Leu Val Val Leu Ser Trp Val Leu Thr Met 85 90 95 Leu His Ala Leu Leu His Thr Leu Leu Val Val Arg Leu Ser Phe Cys 100 105 110 Ser Asp Asn Val Ile Pro His Phe Ser Cys Glu Ile Ser Ala Leu Leu 115 120 125 Lys Leu Ala Cys Ser Asn Thr His Val Asn Glu Leu Val Ile Phe Ile 130 135 140 Thr Gly Gly Leu Val Ile Val Thr Pro Phe Leu Leu Ile Leu Gly Ser 145 150 155 160 Tyr Val Gln Ile Phe Ser Ser Ile Leu Lys Val Pro Ser Ala Arg Gly 165 170 175 Ile His Lys Ala Phe Ser Thr Cys Gly Ser His Leu Ser Val Val Ser 180 185 190 Leu Phe Tyr Gly Thr Ile Ile Gly Leu Tyr Leu Cys Pro Ser Ala Asn 195 200 205 Asn Ser Thr Val Lys Asp Thr Val Val Ala Leu Met Tyr Thr Val Val 210 215 220 Thr Pro Met Leu Asn Pro Phe Ile Tyr Thr Leu Arg Asn 225 230 235 4 234 PRT Mus montanus 4 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Ile Asp Val Cys His 1 5 10 15 Ser Thr Val Thr Val Pro Lys Met Leu Arg Asp Thr Trp Ser Glu Glu 20 25 30 Lys Leu Ile Ser Phe Asp Ala Cys Val Thr Gln Met Phe Phe Leu His 35 40 45 Leu Phe Ala Cys Thr Glu Ile Phe Leu Leu Thr Val Met Ala Tyr Asp 50 55 60 Arg Tyr Val Ala Ile Cys Lys Pro Leu Gln Tyr Met Thr Val Met Asn 65 70 75 80 Trp Lys Val Cys Val Leu Leu Ala Val Ala Leu Trp Ala Gly Gly Thr 85 90 95 Ile His Ser Ile Ser Leu Thr Ser Leu Thr Ile Lys Leu Pro Tyr Cys 100 105 110 Gly Pro Asp Glu Ile Asp Asn Phe Phe Cys Asp Val Pro Gln Val Ile 115 120 125 Lys Leu Ala Cys Thr Asp Thr His Ile Ile Glu Ile Leu Ile Val Ser 130 135 140 Asn Ser Gly Leu Ile Ser Val Val Cys Phe Val Val Leu Val Val Ser 145 150 155 160 Tyr Ala Val Ile Leu Val Ser Leu Arg Gln Gln Ile Ser Glu Gly Arg 165 170 175 Arg Lys Ala Leu Ser Thr Cys Ala Ala His Leu Thr Val Val Thr Leu 180 185 190 Phe Leu Gly His Cys Ile Phe Ile Tyr Ser Arg Pro Ser Thr Ser Leu 195 200 205 Pro Glu Asp Lys Val Val Ser Val Phe Phe Thr Ala Val Thr Pro Leu 210 215 220 Leu Asn Pro Phe Ile Tyr Ser Leu Arg Asn 225 230 5 237 PRT Mus montanus 5 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Leu Leu Glu Ile Gly Tyr 1 5 10 15 Thr Cys Ser Val Ile Pro Lys Met Leu Gln Ser Leu Val Ser Glu Ala 20 25 30 Arg Gly Ile Ser Arg Glu Gly Cys Ala Thr Gln Met Phe Phe Phe Thr 35 40 45 Leu Phe Ala Ile Ser Glu Cys Cys Leu Leu Ala Ala Met Ala Phe Asp 50 55 60 Arg Tyr Met Ala Ile Cys Ser Pro Leu His Tyr Ala Thr Arg Met Ser 65 70 75 80 Arg Gly Val Cys Ala His Leu Ala Val Val Ser Trp Thr Val Gly Cys 85 90 95 Met Val Gly Leu Gly Gln Thr Asn Tyr Ile Phe Ser Leu Asp Phe Cys 100 105 110 Gly Pro Cys Glu Ile Asp His Phe Phe Cys Asp Leu Pro Pro Ile Leu 115 120 125 Ala Leu Ala Cys Gly Asp Thr Ser His Asn Glu Ala Ala Val Phe Val 130 135 140 Val Ala Ile Leu Cys Ile Ser Ser Pro Phe Leu Leu Ile Val Ala Ser 145 150 155 160 Tyr Gly Arg Ile Leu Ala Ala Val Leu Val Met Pro Ser Pro Glu Gly 165 170 175 Arg Arg Lys Ala Leu Ser Thr Cys Ser Ser His Leu Leu Val Val Thr 180 185 190 Leu Phe Tyr Gly Ser Gly Ser Val Thr Tyr Leu Arg Pro Lys Ala Ser 195 200 205 His Ser Pro Gly Met Asp Lys Leu Leu Ala Leu Phe Tyr Thr Val Val 210 215 220 Thr Ser Met Leu Asn Pro Ile Ile Tyr Thr Leu Arg Asn 225 230 235 6 236 PRT Mus montanus 6 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Leu Glu Ile Leu Tyr 1 5 10 15 Thr Ser Thr Val Val Pro Lys Met Leu Glu Gly Phe Leu Gln Val Ala 20 25 30 Ala Ile Ser Val Thr Gly Cys Leu Thr Gln Phe Phe Ile Phe Gly Ser 35 40 45 Leu Ala Thr Ala Glu Cys Phe Leu Leu Ala Val Met Ala Tyr Asp Arg 50 55 60 Phe Leu Ala Ile Cys Tyr Pro Leu Arg Tyr Pro Leu Leu Met Gly Pro 65 70 75 80 Arg Trp Cys Met Gly Leu Val Val Thr Ala Trp Leu Ser Gly Phe Met 85 90 95 Val Asp Glu Leu Val Val Val Leu Met Ala Gln Leu Arg Phe Cys Gly 100 105 110 Ser Asn Arg Ile Asp His Phe Tyr Cys Asp Phe Met Pro Leu Val Val 115 120 125 Leu Ala Cys Ser Asp Pro Arg Val Ala Gln Val Thr Thr Phe Val Leu 130 135 140 Ser Val Val Phe Leu Thr Val Pro Phe Gly Leu Ile Leu Thr Ser Tyr 145 150 155 160 Ala Arg Ile Val Val Thr Val Leu Arg Val Pro Ala Gly Ala Ser Arg 165 170 175 Arg Lys Ala Phe Ser Thr Cys Ser Ser His Leu Ala Val Val Ser Thr 180 185 190 Phe Tyr Gly Thr Leu Met Val Leu Tyr Ile Val Pro Ser Ala Val His 195 200 205 Ser Gln Leu Leu Ser Lys Val Phe Ala Leu Leu Tyr Thr Val Val Thr 210 215 220 Pro Ile Phe Asn Pro Ile Ile Tyr Ser Phe Arg Asn 225 230 235 7 237 PRT Mus montanus 7 Pro Arg Tyr Leu Phe Leu Gly Asn Leu Ser Leu Ala Asp Ile Gly Ile 1 5 10 15 Ser Thr Thr Thr Ile Pro Gln Met Val Val Asn Ile Gln Arg Lys Arg 20 25 30 Lys Thr Ile Ser Tyr Ala Gly Cys Leu Thr Gln Val Cys Phe Val Leu 35 40 45 Ile Phe Ala Gly Ser Glu Asn Phe Leu Leu Ala Ala Met Ala Tyr Asp 50 55 60 Arg Tyr Ala Ala Ile Cys His Pro Leu Arg Tyr Thr Ala Ile Met Asn 65 70 75 80 Pro His Leu Cys Val Leu Leu Val Met Ile Ser Leu Ser Ile Ser Thr 85 90 95 Val Asp Ala Leu Leu His Ser Leu Met Leu Leu Arg Leu Ser Phe Cys 100 105 110 Thr Asp Leu Glu Ile Pro His Phe Phe Cys Glu Leu Asp Gln Val Ile 115 120 125 Thr Leu Ala Cys Ser Asp Thr Leu Ile Asn Asn Leu Leu Ile Tyr Val 130 135 140 Thr Ala Gly Ile Phe Ala Gly Val Pro Leu Ser Gly Ile Ile Phe Ser 145 150 155 160 Tyr Leu His Ile Val Ser Ser Val Leu Arg Met Pro Ser Pro Gly Gly 165 170 175 Val Tyr Lys Ala Phe Ser Thr Cys Gly Ser His Leu Ser Val Val Cys 180 185 190 Leu Phe Tyr Gly Thr Ile Phe Gly Val Tyr Ile Ser Ser Ala Val Thr 195 200 205 Asp Ser Gln Arg Lys Gly Ala Val Ala Ser Val Met Tyr Ser Val Val 210 215 220 Pro Gln Met Leu Asn Pro Ile Ile Tyr Thr Leu Arg Asn 225 230 235 8 176 PRT Mus montanus 8 Gln Ala Leu Ala Tyr Asp Arg Phe Val Ala Ile Cys His Pro Leu His 1 5 10 15 Tyr Leu Val Ile Met Ser Pro Arg His Cys Gly Phe Leu Thr Leu Val 20 25 30 Ser Phe Leu Leu Ser Leu Leu Asp Ser Gln Leu His Ser Phe Met Thr 35 40 45 Leu Asn Ile Thr Ser Phe Lys Asp Val Glu Ile Ser Asn Phe Phe Cys 50 55 60 Asp Pro Ser Gln Leu Leu Asn Leu Ser Cys Ser Asn Thr Phe Ser Asp 65 70 75 80 Asn Ile Val Lys Tyr Phe Leu Gly Ala Phe Tyr Gly Leu Phe Pro Ile 85 90 95 Ser Gly Ile Leu Phe Ser Tyr Tyr Lys Ile Ile Ser Ser Ile Leu Arg 100 105 110 Ile Pro Ser Leu Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser 115 120 125 His Leu Ala Val Val Cys Leu Phe Leu Val Thr Ala Ser Thr Val Tyr 130 135 140 Leu Gly Ser Val Ala Ser His Ser Pro Arg Asn Asp Val Val Ala Ser 145 150 155 160 Leu Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 9 176 PRT Mus montanus 9 Gln Ala Leu Ala Tyr Asp Arg Phe Val Ala Ile Cys Tyr Pro Leu His 1 5 10 15 Tyr Met Val Ile Met Asn Ser Arg Arg Cys Gly Leu Leu Ile Leu Val 20 25 30 Ser Trp Ile Met Ser Ala Leu His Ser Leu Leu Gln Gly Leu Met Met 35 40 45 Leu Arg Leu Ser Phe Cys Thr Asp Leu Glu Ile Ser His Phe Phe Cys 50 55 60 Glu Leu Asn His Leu Val His Leu Ala Cys Ser Asp Thr Phe Leu Asn 65 70 75 80 Glu Val Val Ile Tyr Phe Ala Ala Val Leu Leu Ala Gly Gly Pro Leu 85 90 95 Ala Gly Ile Leu Tyr Ser Tyr Cys Lys Ile Val Ser Ser Ile His Ala 100 105 110 Ile Ser Ser Ala Gln Gly Lys Tyr Lys Ala Phe Ser Thr Cys Ala Ser 115 120 125 His Leu Ser Val Val Ser Leu Phe Tyr Cys Thr Ser Pro Gly Val Tyr 130 135 140 Leu Ser Ser Ala Val Thr Gln Asn Ser His Ser Thr Ala Thr Ala Ser 145 150 155 160 Val Met Tyr Ser Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 10 176 PRT Mus montanus 10 Gln Ala Leu Ala Tyr Asp Arg Phe Val Ala Ile Cys His Pro Leu His 1 5 10 15 Tyr Pro Arg Ile Met Ser Gln Asn Leu Cys Phe Leu Leu Val Val Val 20 25 30 Ser Trp Val Leu Ser Ser Ala Asn Ala Leu Leu His Thr Leu Leu Leu 35 40 45 Ala Arg Leu Ser Phe Leu Arg Gly Ile Thr Leu Pro His Phe Phe Cys 50 55 60 Asp Leu Ser Ala Leu Leu Lys Leu Ser Ser Ser Asp Thr Thr Ile Asn 65 70 75 80 Gln Leu Ala Ile Leu Thr Ala Gly Ser Ala Val Val Thr Leu Pro Phe 85 90 95 Met Cys Ile Leu Val Ser Tyr Gly His Ile Gly Ala Thr Ile Leu Arg 100 105 110 Arg Pro Ser Leu Lys Gly Ile Cys Lys Ala Leu Ser Thr Cys Gly Ser 115 120 125 His Leu Ser Val Val Ser Val Tyr Tyr Gly Ala Val Ile Ala Leu Tyr 130 135 140 Ile Val Pro Ser Ser Asn Ser Thr Asn Asp Lys Asp Ile Ala Val Ser 145 150 155 160 Val Leu Tyr Thr Leu Val Ile Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 11 176 PRT Mus montanus 11 Gln Ala Leu Ala Tyr Asp Arg Phe Leu Ala Ile Cys Tyr Pro Leu His 1 5 10 15 Tyr Thr Val Ile Met Asn Pro Arg Leu Cys Gly Phe Ser Ile Leu Val 20 25 30 Ser Phe Leu Leu Ser Leu Leu Asp Ser Gln Leu His Asn Leu Met Ile 35 40 45 Leu Gln Ile Thr Ser Phe Lys Asp Val Glu Ile Ser Ser Phe Phe Cys 50 55 60 Asp Pro Ser Gln Leu Leu Asn Leu Ser Cys Ser Asp Asn Tyr Ser Ile 65 70 75 80 Asn Thr Gly Lys Tyr Val Leu Phe Ala Leu Tyr Ser Phe Phe Pro Ile 85 90 95 Ser Gly Ile Leu Phe Ser Tyr Tyr Lys Ile Ile Ser Ser Ile Leu Arg 100 105 110 Ile Pro Ser Ser Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser 115 120 125 His Leu Ala Val Phe Cys Leu Phe Leu Gly Thr Gly Thr Ala Val Tyr 130 135 140 Phe Gly Ser Ala Val Ser His Ser Pro Arg Glu Asn Val Val Ser Ser 145 150 155 160 Val Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 12 176 PRT Mus montanus 12 Gln Ala Leu Ala Tyr Asp Arg Phe Val Ala Ile Cys His Pro Leu His 1 5 10 15 Tyr Pro Thr Ile Met Asn Pro Arg Phe Cys Gly Phe Leu Val Leu Val 20 25 30 Ser Phe Leu Val Ser Leu Leu Glu Ser Gln Leu His Asn Leu Ile Ala 35 40 45 Leu Gln Phe Thr Thr Phe Lys Asp Val Lys Ile Ala Asn Phe Phe Cys 50 55 60 Asp Pro Ser Gln Val Leu Ser Leu Ser Cys Ser Gly Thr Phe Ile Asn 65 70 75 80 Ile Ile Val Met Tyr Phe Val Gly Ala Leu Phe Gly Val Phe Pro Ile 85 90 95 Ser Gly Ile Leu Phe Ser Tyr Tyr Lys Ile Val Ser Thr Ile Leu Arg 100 105 110 Ile Pro Ser Ser Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser 115 120 125 His Leu Ser Val Val Cys Leu Phe Tyr Gly Thr Gly Phe Gly Val Tyr 130 135 140 Leu Gly Ser Ala Val Ser His Ser Ser Arg Lys Ser Ala Val Ala Ser 145 150 155 160 Val Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 13 168 PRT Mus montanus 13 Gly Ala Ile Arg Phe Pro Leu His Asn Thr Thr Ile Met Ser Pro Lys 1 5 10 15 Leu Gly Leu Phe Leu Val Val Leu Ser Trp Val Leu Thr Met Phe His 20 25 30 Ala Met Leu His Thr Leu Leu Met Ala Arg Leu Cys Phe Cys Ala Glu 35 40 45 Asn Met Ile Pro His Phe Phe Cys Asp Met Ser Ala Leu Leu Lys Leu 50 55 60 Ser Cys Ser Asn Thr His Val Asn Glu Leu Val Ile Phe Ile Thr Ala 65 70 75 80 Gly Leu Ile Leu Leu Ile Pro Leu Val Leu Ile Leu Leu Ser Tyr Gly 85 90 95 His Ile Val Ser Ser Ile Leu Lys Val Pro Ser Ala Arg Gly Ile His 100 105 110 Lys Thr Phe Ser Thr Cys Gly Ser His Leu Ser Val Val Ser Leu Phe 115 120 125 Tyr Gly Thr Val Ile Gly Leu Tyr Leu Cys Pro Ser Ala Asn Asn Ser 130 135 140 Thr Val Lys Asp Thr Val Met Ala Leu Met Tyr Thr Val Val Thr Pro 145 150 155 160 Met Leu Asn Pro Phe Ile Cys Ser 165 14 176 PRT Mus montanus 14 Gln Ala Leu Ala Tyr Asp Arg Phe Leu Ala Ile Cys His Pro Leu His 1 5 10 15 Tyr Thr Ala Ile Met Asn Pro Arg Leu Cys Gly Leu Leu Val Leu Val 20 25 30 Cys Trp Ile Leu Ser Val Leu His Ala Leu Leu Gln Ser Leu Met Val 35 40 45 Leu Arg Leu Ser Phe Cys Arg Asp Ile Glu Ile Pro His Phe Phe Cys 50 55 60 Glu Leu Asn Gln Val Val Gln Leu Ala Cys Phe Asp Asn Leu Leu Asn 65 70 75 80 Asp Ile Val Met Asn Phe Ala Leu Val Leu Leu Ala Thr Cys Pro Leu 85 90 95 Ala Gly Ile Leu Tyr Ser Tyr Ser Lys Ile Val Ser Ser Ile Arg Ala 100 105 110 Ile Ser Ser Ala Gln Gly Lys Tyr Lys Ala Phe Ser Thr Cys Ala Ser 115 120 125 His Leu Ser Val Val Ser Leu Phe Tyr Cys Thr Gly Leu Gly Val Tyr 130 135 140 Leu Ser Ser Ala Val Ser His Ser Ser Arg Ser Ser Ala Thr Ala Ser 145 150 155 160 Val Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 15 119 PRT Mus montanus 15 His Leu Cys Arg Leu His Leu Thr Val Leu Lys Leu Ala Cys Ser Asp 1 5 10 15 Thr Leu Ile Asn Asn Ile Val Val Phe Ser Met Ile Ile Val Leu Gly 20 25 30 Val Phe Pro Leu Ser Gly Ile Leu Phe Ser Tyr Ser Gln Ile Phe Ser 35 40 45 Ser Ile Leu Arg Ile Ser Ser Asp Arg Gly Lys Tyr Lys Val Phe Ser 50 55 60 Thr Cys Gly Ser His Leu Leu Val Val Ser Leu Phe Tyr Gly Ser Ser 65 70 75 80 Leu Gly Val Tyr Leu Ser Ser Val Ala Thr Leu Ser Ser Arg Met Thr 85 90 95 Leu Met Ala Ser Val Met Tyr Thr Met Val Thr Pro Met Leu Asn Pro 100 105 110 Ile Ile Tyr Thr Leu Arg Asn 115 16 159 PRT Mus montanus 16 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Leu Glu Ile Leu Tyr 1 5 10 15 Thr Ser Thr Val Val Pro Lys Met Leu Glu Gly Phe Leu Gln Val Ala 20 25 30 Ala Ile Ser Val Thr Gly Cys Leu Thr Gln Phe Phe Ile Phe Gly Ser 35 40 45 Leu Ala Thr Ala Glu Cys Phe Leu Leu Ala Val Met Ala Tyr Asp Arg 50 55 60 Phe Leu Ala Ile Cys Tyr Pro Leu Arg Tyr Pro Leu Leu Met Gly Pro 65 70 75 80 Arg Trp Cys Met Gly Leu Val Val Thr Ala Trp Leu Ser Gly Phe Met 85 90 95 Val Asp Glu Leu Val Val Val Leu Met Ala Gln Leu Arg Phe Cys Gly 100 105 110 Ser Asn Arg Ile Asp His Phe Tyr Cys His Phe Met Pro Leu Val Val 115 120 125 Leu Ala Cys Ser Asp Pro Arg Val Ala Gln Val Thr Thr Phe Val Leu 130 135 140 Ser Val Val Pro Leu Thr Val Pro Phe Gly Leu Ile Leu Thr Ser 145 150 155 17 113 PRT Mus montanus 17 Glu Asp Leu Cys Ala Arg Leu Lys Arg Ser Arg Ser Asp Thr Thr Ile 1 5 10 15 Asn Glu Val Gly Ile Leu Thr Ala Gly Ser Ala Val Val Thr Leu Pro 20 25 30 Phe Met Cys Ile Leu Val Ser Tyr Gly His Met Gly Ala Thr Ile Leu 35 40 45 Arg Arg Pro Ser Leu Lys Gly Met Cys Lys Ala Leu Ser Thr Cys Gly 50 55 60 Ser His Leu Cys Val Val Ser Val Tyr Tyr Gly Ala Val Ile Ala Leu 65 70 75 80 Tyr Ile Val Pro Ser Ser Asn Ser Thr Asn Asp Lys Asp Ile Ala Val 85 90 95 Ser Val Leu Tyr Thr Leu Val Ile Pro Met Leu Asn Pro Phe Ile Cys 100 105 110 Ser 18 176 PRT Mus montanus 18 Gln Ala Leu Gly Tyr Asp Arg Phe Val Ala Met Cys His Pro Gly Gln 1 5 10 15 Tyr Leu Val Ile Met Ser Pro Arg His Gly Gly Phe Leu Thr Leu Val 20 25 30 Ser Phe Leu Leu Ser Leu Leu Asp Ser Gln Leu His Ser Phe Met Thr 35 40 45 Leu Asn Ile Thr Ser Phe Lys Asp Val Glu Ile Ser Asn Phe Phe Cys 50 55 60 Asp Pro Ser Gln Leu Leu Asn Leu Ser Cys Ser Asn Thr Phe Ser Asp 65 70 75 80 Asn Ile Val Lys Tyr Phe Leu Gly Ala Phe Tyr Gly Leu Phe Pro Ile 85 90 95 Ser Gly Ile Leu Phe Ser Tyr Tyr Lys Ile Ile Ser Ser Ile Leu Arg 100 105 110 Ile Pro Ser Leu Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser 115 120 125 His Leu Ala Val Val Cys Leu Phe Leu Val Thr Ala Ser Thr Val Tyr 130 135 140 Leu Gly Ser Val Ala Ser His Ser Pro Arg Asn Asp Val Val Ala Ser 145 150 155 160 Leu Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 19 176 PRT Mus montanus 19 Gln Ala Leu Ala Tyr Asp Arg Phe Leu Ala Ile Cys His Pro Leu His 1 5 10 15 Tyr Leu Val Ile Met Ser Pro Arg His Cys Gly Phe Leu Thr Leu Val 20 25 30 Ser Phe Leu Leu Ser Leu Leu Asp Ser Gln Leu His Ser Phe Met Thr 35 40 45 Leu Asn Ile Thr Ser Phe Lys Asp Val Glu Ile Ser Asn Phe Phe Cys 50 55 60 Asp Pro Ser Gln Leu Leu Asn Leu Ser Cys Ser Asn Thr Phe Ser Asp 65 70 75 80 Asn Ile Val Lys Tyr Phe Leu Gly Ala Phe Tyr Gly Leu Phe Pro Ile 85 90 95 Ser Gly Ile Leu Phe Ser Tyr Tyr Lys Ile Ile Ser Ser Ile Leu Arg 100 105 110 Ile Pro Ser Leu Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser 115 120 125 His Leu Ala Val Val Cys Leu Phe Leu Val Thr Ala Ser Thr Val Tyr 130 135 140 Leu Gly Ser Val Ala Ser His Ser Pro Arg Asn Asp Val Val Ala Ser 145 150 155 160 Leu Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 20 176 PRT Mus montanus 20 Gln Ala Leu Ala Tyr Asp Arg Phe Leu Ala Ile Cys His Pro Arg His 1 5 10 15 Tyr Leu Val Ile Met Ser Pro Arg His Cys Gly Phe Leu Thr Leu Val 20 25 30 Ser Phe Leu Leu Ser Leu Leu Asp Ser Gln Leu His Ser Phe Met Thr 35 40 45 Leu Asn Ile Thr Ser Phe Lys Asp Val Glu Ile Ser Asn Phe Phe Cys 50 55 60 Asp Pro Ser Gln Leu Leu Asn Leu Ser Cys Ser Asn Thr Phe Ser Asp 65 70 75 80 Asn Ile Val Lys Tyr Phe Leu Gly Ala Phe Tyr Gly Leu Phe Pro Ile 85 90 95 Ser Gly Ile Leu Phe Ser Tyr Tyr Lys Ile Ile Ser Ser Ile Leu Arg 100 105 110 Ile Pro Ser Leu Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser 115 120 125 His Leu Ala Val Val Cys Leu Phe Leu Val Thr Ala Ser Thr Val Tyr 130 135 140 Leu Gly Ser Val Ala Ser His Ser Pro Arg Asn Asp Val Val Ala Ser 145 150 155 160 Leu Met Tyr Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 165 170 175 21 112 PRT Mus montanus 21 Pro Met Tyr Leu Phe Leu Gly Asn Leu Ser Phe Met Asp Ile Cys Phe 1 5 10 15 Thr Thr Val Val Val Pro Lys Met Leu Ala Asn Leu Leu Ser Glu Thr 20 25 30 Lys Gly Ile Ser Tyr Val Gly Cys Leu Val Gln Met Tyr Phe Phe Met 35 40 45 Ala Phe Gly Asn Thr Asp Ser Tyr Leu Leu Ala Ser Met Ala Ile Asp 50 55 60 Arg Leu Val Ala Ile Cys Asn Pro Leu His Tyr Asp Val Ala Met Arg 65 70 75 80 Pro His Arg Cys Leu Leu Met Leu Leu Gly Ser Cys Thr Ile Ser His 85 90 95 Leu His Ala Leu Phe Arg Val Leu Leu Met Ser Arg Leu Ser Phe Cys 100 105 110 22 119 PRT Mus montanus 22 His Leu Cys Arg Leu His Leu Thr Val Leu Lys Leu Ala Cys Ser Asp 1 5 10 15 Thr Leu Ile Asn Asn Ile Val Val Phe Ser Met Ile Ile Val Leu Gly 20 25 30 Val Phe Pro Leu Ser Gly Ile Leu Phe Ser Tyr Ser Gln Ile Phe Ser 35 40 45 Ser Ile Leu Arg Ile Ser Ser Asp Arg Gly Lys Tyr Lys Val Phe Ser 50 55 60 Thr Cys Gly Ser His Leu Leu Val Val Ser Leu Phe Tyr Gly Ser Ser 65 70 75 80 Leu Gly Val Tyr Leu Ser Ser Val Ala Thr Leu Ser Ser Arg Met Thr 85 90 95 Leu Met Ala Ser Val Met Tyr Thr Met Val Thr Pro Met Leu Asn Pro 100 105 110 Ile Ile Tyr Thr Leu Arg Asn 115 23 141 PRT Mus montanus 23 Trp Ser Leu Leu Glu Ser Gln Leu His Ser Leu Arg Thr Leu Asn Met 1 5 10 15 Thr Ser Phe Arg Asp Val Glu Ser Ser Asn Leu Leu Cys Asp Pro Ser 20 25 30 Gln Met Leu Asn Leu Ser Cys Ser Asn Thr Phe Ser Asp Asn Ile Val 35 40 45 Lys Tyr Phe Leu Gly Ala Phe Tyr Gly Leu Phe Pro Ile Ser Gly Ile 50 55 60 Leu Phe Ser Tyr Tyr Lys Ile Ile Ser Ser Ile Leu Arg Ile Pro Ser 65 70 75 80 Leu Gly Gly Lys Tyr Lys Ala Phe Ser Thr Cys Gly Ser His Leu Ala 85 90 95 Val Val Cys Leu Phe Leu Val Thr Ala Ser Thr Val Tyr Leu Gly Ser 100 105 110 Val Ala Ser His Ser Pro Arg Asn Asp Val Val Ala Ser Leu Met Tyr 115 120 125 Thr Val Val Thr Pro Met Leu Asn Pro Phe Ile Cys Ser 130 135 140 24 711 DNA Mus montanus 24 cctatgtatt tgttccttgg caacttgtcc ttcctggacc tcagcttcac caccagctcc 60 atcccccagc tgctccacaa cctgagtggc cgtgacaaga ccatcagcta tgtgggctgc 120 gtggtccagc tcttcctgtt cctgggcctg ggtggagtgg agtgtctact gctggccgtc 180 atggcctatg acaggttcgt ggccgtctgc aagcccctgc actacacggt gatcatgagt 240 tccaggctct gcctgggctt ggtgtcagtg gcctggggct gtggaatggc caactccttg 300 gtcatgtctc cagtgaccct acaattaccc cgctgcgggc acaataaggt ggaccatttc 360 ctgtgtgaga tgccagccct gatccgcatg gcctgcgtca acacagtggc catagaaggc 420 actgtctttg tcctggccgt gggcatcgtg ctgtctcccc tggtcttcat cttggtgtcc 480 tatggccaca tcgtcagggc ggtgttcaga atccagtcgt cctcaggaag acacagaatc 540 ttcaacacct gtggctccca cctcaccgtg gtctccctgt tctacgggaa catcatctac 600 atgtacatgc agccaggaag caggtcctcc caggaccagg gcaagttcct caccctcttc 660 tacaacatcg tcacccccct cctgaacccc ttcatctatt ccctcaggaa t 711 25 711 DNA Mus montanus 25 cccatgtatt tgttccttgg taacctgtcc tttgtggaag tctgtttaac ctccaccacg 60 gtccccaaga tactggtgaa cacgcagaca ctcagcaaag acatctccta cagaggctgc 120 cttactcagg tgtatttttt aatggttttt gcaggtatgg ataatttcct tctgactgtg 180 atggcctttg accgctttgt ggccatctgc taccccctga actatacggt catcatgaac 240 cccaggctct gtgtcctcct ggtgctgctg tcttggctca tcatgttctg ggtgtcctta 300 cttcacattc tactcctgaa gcgactgacc ttctccagtg gcactgcagt ccctcatttc 360 ttctgtgaac tgtctcagct tctcaaagca accagctctg acaccctcgt caatatcatc 420 ttactgtatg tggtgactgc cctgctgggt atcttccctg ccactgggat cctctactcc 480 tactctcaga tcgtctcttc cttactgagg atgtcctcct ctgtgggcaa gtctaaagcc 540 ttctccacct gtggttccca cctctgtgtg gtctccttgt tctatggaac aggtcttggg 600 gttcacctca gttctgccat gaaccatcct tctcagggaa acatgattgc ctccgtgatg 660 ttacactgtg gtcaccccat gctgaacccc atcatctaca ccctccggaa c 711 26 711 DNA Mus montanus 26 cccatgtact tgtttcttgg caatctgtcc ttcctggagg tctggtacac cacggccgca 60 gtgcccaaag ccctggccat cctgctgggg aggagccaga gcatctcctt catcagctgc 120 ctcctgcaga tgtacctggt cttctcgctg ggctgcacgg agtacttcct ccttgtggcc 180 atggcttatg accgctatgt ggccatctgc ttccccctgc actacaccac catcatgagc 240 ctcaagctct gtctctccct ggtggtgctg tcctgggtgc tgaccatgct ccatgccctg 300 ttgcacactc tgcttgtggt cagattgtct ttctgttcgg acaatgtaat cccacacttt 360 tcctgtgaaa tatctgcttt attgaagctg gcctgctcca acactcatgt caatgaactg 420 gtgatattta tcacgggagg acttgttatt gtcaccccat ttctactcat ccttgggtcc 480 tatgtacaaa ttttctcctc catcctcaag gtcccttctg ctcgtggtat ccacaaggcc 540 ttctctacct gtggctccca cctctctgtg gtgtcactgt tctatgggac aattattggt 600 ctctatttat gtccatcagc taataattct actgtgaaag acactgtcgt ggctctgatg 660 tacacggtgg tgactcccat gctgaacccc ttcatctaca ccctccgaaa t 711 27 702 DNA Mus montanus 27 cccatgtact tgtttctcgg taacctgtcc tttatcgatg tctgccactc cactgtcact 60 gtgcccaaga tgctgagaga cacctggtca gaggagaagc tcatctcctt tgatgcctgt 120 gtgacccaga tgttcttcct gcacctcttt gcctgcacag agatcttcct cctcaccgtc 180 atggcctatg atcgttatgt ggccatctgt aaacccctgc agtacatgac agtgatgaat 240 tggaaggtat gtgtgctgct ggctgtggcc ctctgggcag gaggaaccat ccactccata 300 tccctgacct ccctcaccat caagctgccc tactgtggtc ctgatgagat tgacaacttc 360 ttctgtgacg tgccgcaggt gatcaaattg gcctgcactg acacccacat cattgagatc 420 ctcatcgtct ccaacagtgg gctgatctcc gtggtctgtt ttgtcgtcct tgtggtgtcc 480 tatgcagtca tcctggtgag tctgcggcag cagatctccg agggcaggcg gaaggccctg 540 tccacctgtg cagcccacct cactgtggtc acactgttcc tgggacactg catcttcatc 600 tattcccgcc catccaccag cctcccagag gacaaagtgg tgtctgtgtt tttcactgct 660 gtcacccctc tgctaaaccc cttcatctac tccctccgaa at 702 28 711 DNA Mus montanus 28 cccatgtatt tgttccttgg taacttgtct ctcctagaga ttggctacac ttgctctgtc 60 atacccaaga tgctgcagag tcttgtgagt gaggcccgag gaatctctcg ggagggttgt 120 gccacacaga tgtttttctt tacattattt gctatcagtg agtgctgcct tttggcagcc 180 atggcttttg accgctatat ggccatatgt tccccactcc actatgcaac acgaatgagt 240 cgtggggtgt gtgcccattt ggcagtggtt tcttggacag tgggatgcat ggtaggcttg 300 ggccaaacca attatatttt ctccttagac ttctgtggcc cctgtgagat agaccacttc 360 ttctgtgatc tcccacctat cctggcactt gcttgtgggg atacatccca taatgaggct 420 gcggtctttg tggtggcaat cctttgcatt tctagcccat ttttattgat cgttgcttcc 480 tatggcagaa ttctagctgc agtcctggtc atgccctccc ctgagggccg ccggaaagct 540 ctctccacct gttcttccca cttacttgta gtaacgctct tctatggctc aggatctgtt 600 acctacttga ggcccaaggc tagccactca ccaggaatgg ataaactgct agccctcttc 660 tataccgtgg tgacatccat gctcaacccc atcatctaca ccctccggaa c 711 29 708 DNA Mus montanus 29 cccatgtact tgttcctcgg taatttgtcc ttcctggaga tcctttatac atccacagtg 60 gtgccgaaaa tgctggaggg cttcctgcag gtggcagcca tctctgtgac tggttgcttg 120 acccagttct tcatctttgg ttctctagcc acagcagaat gcttcctact ggctgttatg 180 gcatatgatc gcttcttggc aatctgctac ccacttcgct atccactcct gatggggcct 240 agatggtgca tggggctggt ggtcacagcc tggctgtctg gcttcatggt agatgaatta 300 gttgtggtcc tgatggccca gctgaggttc tgtggctcca atcgcatcga tcacttttac 360 tgtgacttca tgcctttggt ggtcctggct tgctcagatc ccagagtagc ccaggtgaca 420 acatttgttc tctctgtagt cttcctcact gttccatttg gactgattct gacatcctat 480 gctcgcatcg tggtgactgt gctgagagtt cctgctgggg ccagcaggag aaaggctttt 540 tccacatgct cctcccacct tgctgtagtg tccaccttct atggaactct catggtcttg 600 tacattgtgc cctcagctgt ccactcccag ctcctctcca aggtctttgc cttgctctat 660 actgtggtca ctcccatctt caaccccatc atctactcct tccggaat 708 30 711 DNA Mus montanus 30 cccaggtact tgtttcttgg caatttgtct ttggccgaca ttgggatcag cacaaccacg 60 atcccccaga tggtggtgaa catccagaga aagagaaaga ccatcagtta cgcaggctgc 120 ctcacccagg tctgctttgt cctgattttt gctggatcgg agaactttct ccttgcagca 180 atggcttatg accgttacgc agccatctgc catcccctca ggtacacggc catcatgaac 240 ccccacctgt gtgtcctgct ggttatgatc tccttgtcca tcagcacggt ggatgccctg 300 ctgcacagtc tgatgctgct gaggctgtcc ttctgcacag acctggagat cccccacttc 360 ttctgtgaac ttgatcaggt gatcacactg gcctgttctg acaccctcat caataacctc 420 ctgatatatg tcacagctgg gatatttgct ggtgttcctc tctctggaat catcttctct 480 taccttcaca ttgtgtcctc tgtcttgaga atgccatcac caggaggagt gtataaagcc 540 ttttccacct gtggctctca cctgtctgtg gtctgcttgt tctatgggac aatttttggg 600 gtgtacatta gctctgcagt gactgactca cagagaaaag gtgcagtggc ctcagtgatg 660 tactctgtgg tccctcagat gctgaacccc atcatctaca ccctcagaaa c 711 31 528 DNA Mus montanus 31 caagctttgg cgtatgacag gtttgtggcc atctgtcatc ctctgcatta tctggtcatt 60 atgagccctc gccattgtgg cttcttaact ttggtgtcat ttttgctgag tcttttggac 120 tcccagctgc acagtttcat gaccttaaat attaccagct tcaaggatgt ggaaatttct 180 aatttcttct gtgacccttc tcaactgctg aatctctcct gttccaacac cttctctgat 240 aacattgtca agtattttct gggagccttc tatggccttt ttcccatctc agggatcctt 300 ttctcttact acaaaattat ttcctccatt ctgaggatcc cctccttagg tgggaagtac 360 aaagccttct ccacctgtgg gtctcacctg gcagttgttt gcttattttt agtgacagcc 420 tccacagtgt accttggatc agttgcatca cattctccca gaaatgatgt ggtggcttct 480 ctgatgtaca ctgtggtcac ccccatgctc aatcccttca tctgcagt 528 32 528 DNA Mus montanus 32 caagctttgg cgtatgatag gtttgtggcc atctgctacc ccctgcacta catggtcatc 60 atgaactccc ggcgatgtgg attgctgatt ctggtgtctt ggatcatgag tgctcttcat 120 tccttgttac aaggtttaat gatgttgaga ctgtccttct gcacagattt ggaaatctcc 180 cactttttct gtgaacttaa tcacctggtc catcttgcct gctctgacac ctttctcaat 240 gaggtggtga tatattttgc tgctgtcttg ctggctggtg gccccctcgc tggcatcctt 300 tactcttact gcaagatagt ctcctccatc catgcaatct cttcagctca gggcaagtac 360 aaagccttct ccacctgtgc atctcacctc tccgtggtct ccttatttta ttgtacaagc 420 ccgggtgtgt acctcagttc tgctgtgacc caaaactcac actccactgc aactgcctcg 480 gtgatgtaca gcgtggtcac ccccatgctc aaccccttta tctgcagt 528 33 528 DNA Mus montanus 33 caagctttgg cgtacgacag gtttgtggcc atctgtcacc cactgcatta tcccagaatc 60 atgagtcaga acctctgttt cctgctagtg gttgtgtcct gggtcttatc ctctgccaat 120 gcccttttgc acaccctcct cctagcccgt ctctctttcc ttagaggcat cactctgccc 180 cacttcttct gtgatctctc tgcgttactc aagctatcca gctctgacac caccatcaat 240 cagctggcta ttctcacggc aggatcagca gttgttaccc tgccattcat gtgcattctg 300 gtctcatatg gccacattgg ggccaccatc ctgagaagac cctccctcaa gggcatctgc 360 aaagccttat ccacatgtgg ctcccacctc tctgtggtct ctgtgtacta tggagcagtt 420 attgcactct atattgtccc ctcatctaat agcactaatg acaaggatat tgctgtgtct 480 gtgttgtata ctctggtcat ccccatgctc aaccccttca tctgcagt 528 34 528 DNA Mus montanus 34 caagctttgg cgtatgatag gttcttggcc atctgttatc ccctgcatta tacagtcatt 60 atgaaccctc gcctctgtgg cttctcaatt ttggtatcat ttttgctgag tctcttggac 120 tctcagctgc acaatttgat gatcttacaa attaccagtt tcaaggatgt ggaaatttct 180 agtttcttct gtgacccttc tcaacttctg aatctttcct gttctgacaa ctactctatt 240 aatactggca agtatgttct ttttgcccta tatagctttt tccccatctc agggatcctt 300 ttctcttact ataaaataat ttcctccatt ctgaggatcc catcctcagg ggggaagtac 360 aaagccttct ccacttgtgg ctctcacctg gcagtttttt gcctattttt aggaacaggt 420 actgcagtgt actttggatc agctgtatca cattctccca gggagaatgt ggtgtcctca 480 gtaatgtata ctgtggtcac ccccatgctc aatcccttta tctgcagt 528 35 528 DNA Mus montanus 35 caagctttgg cgtatgacag gtttgtggcc atctgtcacc ccctgcatta tccaaccatt 60 atgaaccctc gattttgtgg ctttttagtt ttggtgtctt ttttggttag ccttttggaa 120 tcccagctgc acaatttgat tgcattacag tttactactt tcaaagatgt aaaaattgct 180 aattttttct gtgacccttc tcaggtcctc agtctttcct gttctggcac cttcatcaat 240 atcatagtaa tgtattttgt tggtgctcta tttggtgttt ttcccatctc aggaatcctt 300 ttctcttact ataaaatagt ttccactatt ctgagaatcc catcctcagg tgggaaatat 360 aaagccttct ctacctgtgg gtctcaccta tcagttgttt gtttatttta tggaacaggc 420 tttggagtgt accttggttc agctgtgtca cattcttcta gaaaatctgc agtggcctcg 480 gtgatgtaca cagttgtcac ccccatgctc aaccccttca tctgcagt 528 36 504 DNA Mus montanus 36 ggggccattc gctttcccct gcacaatact accatcatga gccccaagct cggtctcttc 60 ctggtggtgc tgtcctgggt gctaaccatg ttccatgcca tgctccatac cctgcttatg 120 gccagattgt gtttctgtgc agagaacatg attccccatt ttttctgtga tatgtctgcc 180 cttctgaagc tgtcctgctc caacactcat gtcaatgagt tggtgatatt catcacagca 240 ggcctcattc ttctcattcc attggtcctc attcttcttt cctatgggca catcgtgtcc 300 tccattctca aggtcccttc tgctcgaggt atccataaga ccttctccac ctgtggctcc 360 catttgtctg tggtgtcact gttctatggg acagtcatcg gactctactt atgtccatca 420 gctaataatt ctactgtgaa agatactgtc atggctctga tgtacacggt ggtcactccc 480 atgctcaatc cctttatctg cagt 504 37 528 DNA Mus montanus 37 caagctttgg cgtatgacag attcctggcc atatgtcacc cactgcacta cactgccatc 60 atgaatccca ggctctgtgg tttgctggtt ctggtgtgct ggatcctgag tgtcctgcat 120 gccttgttgc aaagcttaat ggtgttgcga ctgtccttct gcagagacat agaaatcccc 180 cattttttct gtgaactcaa ccaggtggtc caacttgcct gttttgacaa ccttcttaat 240 gacatagtga tgaattttgc acttgtgctc ttggctactt gtcccctcgc tggcattctt 300 tactcctact ccaagatagt ctcctccatc cgtgcaatct cttcagctca gggcaagtac 360 aaagcctttt ccacctgtgc ctcccacctc tctgtggtct ccttatttta ctgcacaggc 420 ctgggtgtgt acctcagttc tgctgtatcc cacagctcac gctccagtgc aacagcctca 480 gtgatgtaca ccgtggtcac ccccatgctc aaccccttca tctgcagt 528 38 357 DNA Mus montanus 38 cacctttgca ggttgcatct cacagtcctc aagctcgcct gctctgacac cctcatcaac 60 aacatagtgg tgttctctat gatcatcgtc ctgggtgtct tccctctcag tggcatcctc 120 ttctcctact ctcagatttt ctcctccatc ctgaggatct catcagacag aggcaagtac 180 aaagtcttct ccacctgtgg gtctcacctc ctggtggtct ccttgttcta tggcagtagc 240 cttggggtct acctcagttc tgtagccaca ctgtcttcta ggatgactct gatggcctca 300 gtgatgtaca ccatggtcac ccccatgctg aaccccatca tctacaccct ccggaac 357 39 477 DNA Mus montanus 39 cccatgtact tgttcctcgg taatttgtcc ttcctggaga tcctttatac atccacagtg 60 gtgccgaaaa tgctggaggg cttcctgcag gtggcagcca tctctgtgac tggttgcttg 120 acccagttct tcatctttgg ttctctagcc acagcagaat gcttcctact ggctgttatg 180 gcatatgatc gcttcttggc aatctgctac ccacttcgct atccactcct gatggggcct 240 agatggtgca tggggctggt ggtcacagcc tggctgtctg gcttcatggt agatgaatta 300 gttgtggtcc tgatggccca gctgaggttc tgtggctcca atcgcatcga tcacttttac 360 tgtcacttca tgcctttggt ggtcctggct tgctcagatc cccgagtagc ccaggtgaca 420 acatttgttc tctctgtagt ccccctcact gttccattcg gactgattct gacatcc 477 40 339 DNA Mus montanus 40 gaggatctat gtgcgagact caagcgatcc aggtcggaca ccaccatcaa tgaggtgggt 60 attctcacgg caggatcagc agttgttacc ctgccattca tgtgcattct ggtctcatat 120 ggccacatgg gggccaccat cctgagaaga ccctccctca agggcatgtg caaagcctta 180 tccacatgtg gctcccacct ctgtgtggtc tctgtgtact atggagcagt tattgcactc 240 tatattgtcc cctcatctaa tagcactaat gacaaggata ttgctgtgtc tgtgttgtat 300 actctggtca tccccatgct caaccccttc atctgcagt 339 41 528 DNA Mus montanus 41 caagctttgg ggtatgatag atttgtggcc atgtgtcatc ctgggcagta tctggtcatt 60 atgagccctc gccatggtgg cttcctaact ttggtgtcat ttttgctgag tcttttggac 120 tcccagctgc acagtttcat gaccttaaat attaccagct tcaaggatgt ggaaatttct 180 aatttcttct gtgacccttc tcaactgctg aatctctcct gttccaacac cttctctgat 240 aacattgtca agtattttct gggagccttc tatggccttt ttcccatctc agggatcctt 300 ttctcttact acaaaattat ttcctccatt ctgaggatcc cctccttagg tgggaagtac 360 aaagccttct ccacctgtgg gtctcacctg gcagttgttt gcttattttt agtgacagcc 420 tccacagtgt accttggatc agttgcatca cattctccca gaaatgatgt ggtggcttct 480 ctgatgtaca ctgtggtcac ccccatgctc aaccccttca tctgcagt 528 42 528 DNA Mus montanus 42 caagctttgg cgtatgacag atttctggcc atctgtcatc ctctgcatta tctggtcatt 60 atgagccctc gccattgtgg cttcttaact ttggtgtcat ttttgctgag tcttttggac 120 tcccagctgc acagtttcat gaccttaaat attaccagct tcaaggatgt ggaaatttct 180 aatttcttct gtgacccttc tcaactgctg aatctctcct gttccaacac cttctctgat 240 aacattgtca agtattttct gggagccttc tatggccttt ttcccatctc agggatcctt 300 ttctcttact acaaaattat ttcctccatt ctgaggatcc cctccttagg tgggaagtac 360 aaagccttct ccacctgtgg gtctcacctg gcagttgtct gcttattttt agtgacagcc 420 tccacagtgt accttggatc agttgcatca cattctccca gaaatgatgt ggtggcttct 480 ctgatgtaca ctgtggtcac ccccatgctc aaccccttta tctgcagt 528 43 528 DNA Mus montanus 43 caagctttgg cgtatgacag gttcctggcc atctgtcatc ctcggcatta tctggtcatt 60 atgagccctc gccattgtgg cttcttaact ttggtgtcat ttttgctgag tcttttggac 120 tcccagctgc acagtttcat gaccttaaat attaccagct tcaaggatgt ggaaatttct 180 aatttcttct gtgacccttc tcaactgctg aatctctcct gttccaacac cttctctgat 240 aacattgtca agtattttct gggagccttc tatggccttt ttcccatctc agggatcctt 300 ttctcttact acaaaattat ttcctccatt ctgaggatcc cctccttagg tgggaagtac 360 aaagccttct ccacctgtgg gtctcacctg gcagttgttt gcttattttt agtgacagcc 420 tccacagtgt accttggatc agttgcatca cattctccca gaaatgatgt ggtggcttct 480 ctgatgtaca ctgtggtcac ccccatgctc aatcccttca tctgcagt 528 44 336 DNA Mus montanus 44 cccatgtatt tgtttctcgg taacctgtcc ttcatggaca tctgcttcac aacagtcgtt 60 gtgcccaaga tgctggcgaa tttgctgtca gagacaaagg gcatctccta tgtaggctgc 120 ctggtccaga tgtatttctt catggccttt gggaacactg atagttacct gctggcctcc 180 atggccatcg accggctggt ggccatctgc aaccccttgc actatgatgt ggccatgcgc 240 ccacaccgct gcctcctcat gctgctgggt tcttgcacca tctcccacct gcacgccctc 300 ttccgggtgc tactcatgtc tcgcctctct ttctgt 336 45 357 DNA Mus montanus 45 cacctttgca ggttgcatct cacagtcctc aagctcgcct gctctgacac cctcatcaac 60 aacatagtgg tgttctctat gatcatcgtc ctgggtgtct tccctctcag tggcatcctc 120 ttctcctact ctcagatttt ctcctccatc ctgaggatct catcagacag aggcaagtac 180 aaagtcttct ccacctgtgg gtctcacctc ctggtggtct ccttgttcta tggcagtagc 240 cttggggtct acctcagttc tgtagccaca ctgtcttcta ggatgactct gatggcctca 300 gtgatgtaca ccatggtcac ccccatgctg aaccccatta tctacaccct ccggaac 357 46 423 DNA Mus montanus 46 tggagtcttt tggagtccca gctgcacagt ttgaggacct taaatatgac cagcttcagg 60 gatgtggaaa gttctaattt gttgtgtgac ccttctcaaa tgctgaatct ctcctgttcc 120 aacaccttct ctgataacat tgtcaagtat tttctgggag ccttctatgg cctttttccc 180 atctcaggga tccttttctc ttactacaaa attatttcct ccattctgag gatcccctcc 240 ttaggtggga agtacaaagc cttctccacc tgtgggtctc acctggcagt tgtttgctta 300 tttttagtga cagcctccac agtgtacctt ggatcagttg catcacattc tcccagaaat 360 gatgtggtgg cttctctgat gtacactgtg gtcaccccca tgctcaaccc ctttatctgc 420 agt 423 47 29 DNA Artificial Sequence Description of Artificial Sequence Primer 47 ccyatgtayt tnttyctyns yaayntntc 29 48 29 DNA Artificial Sequence Description of Artificial Sequence Primer 48 ccyatgtayt tgttyctygs yaayytgtc 29 49 27 DNA Artificial Sequence Description of Artificial Sequence Primer 49 rttycknarr swrtanatra wnggrtt 27 50 28 DNA Artificial Sequence Description of Artificial Sequence Primer 50 gcactgcaga traanggrtt naratngg 28 51 31 DNA Artificial Sequence Description of Artificial Sequence Primer 51 cacaagcttt ngcntaygay agrtwybtng c 31 52 29 DNA Artificial Sequence Description of Artificial Sequence Primer 52 gcactgcaga traanggrtt narcatngg 29 

What is claimed is:
 1. A purified olfactory receptor of a marmot.
 2. An olfactory receptor comprising an amino acid sequence selected from SEQ ID No:1 to SEQ ID No:23, or functionally equivalent derivative thereof.
 3. The receptor according to claim 2, comprising an amino acid sequence having about 75% homology with an amino acid sequence selected from SEQ ID No:1 to SEQ ID No:23.
 4. The receptor according to claim 2, comprising an amino acid sequence having about 95% homology with an amino acid sequence selected from SEQ ID No:1 to SEQ ID No:23.
 5. The receptor according to claim 2, comprising an amino acid sequence selected from SEQ ID No:1 to SEQ ID No:23 in which at least one heterogeneous region is modified.
 6. An antibody directed against at least one receptor according to claim 1 or a derivative or a fragment thereof.
 7. A nucleic acid fragment comprising a nucleic sequence encoding a receptor according to claim
 2. 8. A nucleic acid fragment according to claim 7, comprising a sequence selected from SEQ ID No:24 to SEQ ID No:47.
 9. A vector comprising at least one nucleic acid fragment according to claim 7, operably connected to at least one regulatory sequence.
 10. A method for making a receptor comprising: a) transferring a molecule of nucleic acid according to claim 7 into a cellular host, b) cultivating said cellular host under conditions suitable for production of the receptor, and c) isolating said receptor.
 11. A method for making a receptor comprising: a) transforming a cellular host with the vector of claim 9; b) cultivating said cellular host under conditions suitable for production of the receptor, and c) isolating said receptor.
 12. An expression process of a receptor in a host, comprising: a) transforming a host with the nucleic acid fragment of claim 7; and b) cultivating said host under conditions suitable for expression of said receptor at a surface of the host.
 13. An expression process of a receptor in a host, comprising: a) transferring a vector according to claim 9 into a host, b) cultivating said host under conditions suitable for expression of said receptor at a surface of the host.
 14. A host transformed by the nucleic acid fragment according to claim
 7. 15. A host transformed by a vector according to claim
 9. 16. A method for screening compounds which are capable of binding to the receptor according to claim 2, comprising: a) contacting a compound and at least one receptor; and b) measuring affinity between said compound and said receptor.
 17. A membrane on which at least one receptor comprising an amino acid sequence selected from SEQ ID No:1 to SEQ ID No.:23, or a functionally equivalent derivative thereof is immobilized in said membrane for use in the method of claim
 16. 18. A compound constituting a ligand of an olfactory receptor, identified and selected by the process according to claim
 13. 19. Utilization of a receptor according to claim 2, for detection of aromas, quality control, sample analysis, analysis or comparison of perfumes, detection of toxic substances, or trapping of odors.
 20. Utilization of a host according to claim 14, for detection of aromas, quality control, sample analysis, analysis or comparison of perfumes, detection of toxic substances, or trapping of odors.
 21. Utilization of a membrane according to claim 17, for detection of aromas, quality control, sample analysis, analysis or comparison of perfumes, detection of toxic substances, or trapping of odors. 